Wrench.



M. -NIGHOLAS.

WRENGH. APPLIGATION FILED DEO. 31, 1913.

1,095,021 Patented. Apr. 28, 1914.

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UNITED STATES PATENT OFFICE.

MATTHEW NICI-IOLAS, or BOULDEE, COLORADO.

WRENCH.

To (zZZ %ham 'it may concern Be it lnown that I, MA'r'ri-rnw NIGHOLAS, a citizen of the United States, residing at- Boulder, in the county of Boulder and State of Colorado, have invented new and useful Improvements in Wrenches ot which the following is a specification.

The present invention relates to wrenches, and particularly to that class of wrenches having their opposite ends provided with jaws which are eonnected by a shank, and an intermediate jaw arranged for longitudinal movement upon the shank, and the improvement resides in the construction, combination and arrangement of parts set forth in the following specification and falling within the scope of the appended claim.

In the drawing: Figure 1 is a-side elevation of a wrench constructed in accordance with the present invention, Fig; 2 is a central vertioal longitudinal sectional view taken through the movable aws and through the screw arranged upon the Connecting shank of the stationary jaws, Fig. 3 is a transverse seotio-nal view on the line 3-3 of Fig. 2, Fig. 4 is a erspective view illustrating one of the movable jaws and the screw for moving the jaw and engaging with one of the removable members applied to the jaw, the second member being removed from the jaw, Fig. 5 is a detail perspective view of one of the screw engaging members or bosses removed from one of the jaws, and Fig. 6 is a perspective view looking toward the rear of one of the jaws.

The wrench embodies two heads 1 and 2 respeotively which are connected through the medium of a shanl 3. This shank is square or rectangular in cross section, and preferably has its ends arranged in openings in the heads 1 and 2, and removably secured to the heads in any desired or preferred manner.

Arranged for longitudinal movement upon the shank 3 is a pair of jaws 4; and 5 respectively, the jaw 4: being arranged adjacent the head 1, while the jaw 5 is adapted to co-act with the head 2.

Positioned upon the shank 3, intermediate of the jaws 4: and 5 is a screw nut 6, the outer face of which being milled and the inner threaded bore co-acting with threads 7-7 formed upon two of the opposite faces of the shank 3. The opposite ends of the screw nut 6 are provided with annular reduced projections or rings 8, a slot 9 be- Specfication of Letters Patent.

Application filed December 31, 1913.

Patented Apr. 28, 1914.

Serial No. 809,748.

ing disposed between each of the rings and each of the ends of the screw nut Each of the jaws 4 and 5 have removably secured upon their opposite faces, the side plates 10 of screw nut engaging members 11. These members are each preferably forned from a single piece of metal and have their ends, adjacent their sides, bent at a right angle over the rear taces of the jaws 4 and 5, the opposite transverse edges of said angular portions 12 being inturned, as at 18, and the said portions 11, 12 and 13, when the plates 10 are secured to the jaws, provide, what may be termed, substantially rectangular boXes. The screw nut engaging members are arranged in pairs, two upon each of the jaws and the securing elements being connected with the side members or plates 10 provide for the separation of one of the elements without interfer'ing with the second element. The angular portions 12 of each of the elements is provided with a Semi-cylindrical depression which, meeting with a snnilar depression upon the adj acent element provides the boXes of each of the nuts with a rounded Opening, and the edges of the boXes provided by the said openings are adapted to be received within the slots 9 over the rings 8 of the screw nut 6. By such an arrangement it will be noted that the jaw l may be moved toward the head 1, and the jaw 5 away from the head 2, when the nutis rotated in' one direction, and that the said jaws will be caused to move in an opposite direction when the screw nut is turned in a reverse direction upon the threaded shank 3.

From the above description, taken in connection with the accompanying drawin the simplicity of the device as well as the advantages thereof will, it is thought, be perectly apparent to those skilled in the art to which such inventions appertain without further detailed description, it may be stated, however, that either of the heads 1 and 2 may be removed and a handle having a socket applied to the shank, so that a greater amount of leverage may be obtained for operating the wrench, and further it is to be noted that either of the heads 1 and 2 may serve as a lever when the second head and movable jaw is in engaging position with an article. V

Having thus described the invention, what I claim is:

V A wrench including two heads connected through the medium of a removable rectangular shank, the said shank having two of its opposite sides threaded, a screw nut upon the shank and* engaging the threads thereof, said screW nut having opposite ends p provided with reduced ends and being provided with an annular slot between the ends and the nut proper, longitudinally novable jaWs, one disposed upon each of the opposite ends of the nut, a pair of plates removably secured to the opposite sides of each of the jaws, said plates having their ends inturned over the rear face of the j aWs and the meeting edges contacting, the upper edges of the inturned portions being bent inwardly to space the first mentioned angular portions Copies of this petent may be obtained for five cents each, by addressing the Commssioner of Patents, Washington, D. C. 

